Malicious PDF — malware analysis report

Static analysis result for SHA-256 9264616d3c82acc7…

MALICIOUS

PDF

88.5 KB Created: 2021-06-29 20:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9c43934daf1b4c7645a0a7d8bac7af4a SHA-1: 3fe8eea7085afed863ec3828a2d812e7ff32ce51 SHA-256: 9264616d3c82acc79bfcc8346ef5f4bedce2218167703f27ced837970ca8f129
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document employs a social engineering lure, instructing the user to install a browser extension or update to view content, a common tactic for credential theft. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it may lead to the download of a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce02443bffa---parabomuvuganeda.pdf In PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/94646196392.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/85349792360.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/17077252488.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160773dfdec27c---55435924237.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608907d881720---10885656438.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/36c4f4066519a4e66377de30801a0a2c/papipofuxusagubowojew.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7dcf10d32---gozezulogesotof.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/jabokodukigiduvasujekiriw.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/gezogixurutami.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a613c1ed02a---bopopuwitidujokojo.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb70d53b9e---gedejivodozinewi.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6ff9eaa7---bejofoz.pdfIn PDF document text
    • http://safetypath.net/cms_images/lolulororiloworuniv.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/1k62k3bpja2df1f6qestq67kl3/95113439095.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/76107351478.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1af2ac793a---tizaxilopurolimesobenezuf.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/9302343368.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607522d74c6a1---37913124799.pdfIn PDF document text
    • https://sambelteri.com/contents//files/53272532308.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/d52451a6237885bef53cb01fb3817253/20617235072.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609864168c16a---12871561130.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/69543686618.pdfIn PDF document text
    • https://mollis.rs//files/ridimupepotelebuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mp4+to+wma+converter+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 10636 bytes
SHA-256: 2d1269e029e8a4155a6cfbef4e55d75f755fbca1865b9381f4914f11cafd1bf8
font_01_sfnt_off00010f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F56 17348 bytes
SHA-256: abc20ed1a9fe7d8d2df94734bbf87f17edd86357d1b06f60790aae265df2c7b2
font_02_sfnt_off00013cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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